The crystals that form in slowly cooling magma are 'large rocks'.
I think that is the answer, not 100% sure!
I think A but I'm not totally sure!! Good luck.
The biome would be temperate coniferous forest
They contain symbiotic bacteria called rhizobia within nodules in their root systems, producing nitrogen compounds that help the plant to grow and compete with other plants. When the plant dies, the fixed nitrogen is released, making it available to other plants; this helps to fertilize the soil.
